It could become illegal to resell your iPhone 4, car or family antiques.

CHICAGO (MarketWatch) — Tucked into the U.S. Supreme Court’s agenda this fall is a little-known case that could upend your ability to resell everything from your grandmother’s antique furniture to your iPhone 4.

At issue in Kirtsaeng v. John Wiley & Sons is the first-sale doctrine in copyright law, which allows you to buy and then sell things like electronics, books, artwork and furniture, as well as CDs and DVDs, without getting permission from the copyright holder of those products.

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A Supreme Court case could limit the resale of goods made overseas but sold in America.

Under the doctrine, which the Supreme Court has recognized since 1908, you can resell your stuff without worry because the copyright holder only had control over the first sale.

Put simply, though Apple Inc. AAPL -2.13% has the copyright on the iPhone and Mark Owen has it on the book “No Easy Day,” you can still sell your copies to whomever you please whenever you want without retribution.

That’s being challenged now for products that are made abroad, and if the Supreme Court upholds an appellate court ruling, it would mean that the copyright holders of anything you own that has been made in China, Japan or Europe, for example, would have to give you permission to sell it.

“It means that it’s harder for consumers to buy used products and harder for them to sell them,” said Jonathan Band, an adjunct professor at Georgetown University Law Center, who filed a friend-of-the-court brief on behalf of the American Library Association, the Association of College and Research Libraries and the Association for Research Libraries. “This has huge consumer impact on all consumer groups.”

Another likely result is that it would hit you financially because the copyright holder would now want a piece of that sale.

It could be your personal electronic devices or the family jewels that have been passed down from your great-grandparents who immigrated from Spain. It could be a book that was written by an American writer but printed and bound overseas, or an Italian painter’s artwork.

There are implications for a variety of wide-ranging U.S. entities, including libraries, musicians, museums and even resale juggernauts eBay Inc. EBAY -1.54% and Craigslist. U.S. libraries, for example, carry some 200 million books from foreign publishers.

“It would be absurd to say anything manufactured abroad can’t be bought or sold here,” said Marvin Ammori, a First Amendment lawyer and Schwartz Fellow at the New American Foundation who specializes in technology issues.

The case stems from Supap Kirtsaeng’s college experience. A native of Thailand, Kirtsaeng came to America in 1997 to study at Cornell University. When he discovered that his textbooks, produced by Wiley, were substantially cheaper to buy in Thailand than they were in Ithaca, N.Y., he rallied his Thai relatives to buy the books and ship them to him in the United States.

He then sold them on eBay, making upward of $1.2 million, according to court documents.

Wiley, which admitted that it charged less for books sold abroad than it did in the United States, sued him for copyright infringement. Kirtsaeng countered with the first-sale doctrine.

In August 2011, the U.S. Court of Appeals for the Second Circuit upheld a lower court’s ruling that anything that was manufactured overseas is not subject to the first-sale principle. Only American-made products or “copies manufactured domestically” were.

The Supreme Court is scheduled to hear oral arguments on the case on Oct. 29.

Both Ammori and Band worry that a decision in favor of the lower court would lead to some strange, even absurd consequences. For example, it could become an incentive for manufacturers to have everything produced overseas because they would be able to control every resale.

It could also become a weighty issue for auto trade-ins and resales, considering about 40% of most U.S.-made cars carry technology and parts that were made overseas.

This is a particularly important decision for the likes of eBay and Craigslist, whose very business platform relies on the secondary marketplace. If sellers had to get permission to peddle their wares on the sites, they likely wouldn’t do it.

Moreover, a major manufacturer would likely go to eBay to get it to pull a for-sale item off the site than to the individual seller, Ammori added.

In its friend-of-the-court brief, eBay noted that the Second Circuit’s rule “affords copyright owners the ability to control the downstream sales of goods for which they have already been paid.” What’s more, it “allows for significant adverse consequences for trade, e-commerce, secondary markets, small businesses, consumers and jobs in the United States.”

Ammori, for one, wonders what the impact would be to individual Supreme Court justices who may buy and sell things of their own. He himself once bought an antique desk from a Supreme Court justice. “Sometimes it’s impossible to tell where things have been manufactured,” he said. “Who doesn’t buy and sell things? Millions of Americans would be affected by this.”

If the Supreme Court does rule with the appellate court, it’s likely that the matter would be brought to Congress to force a change in law. Until then, however, consumers would be stuck between a rock and a hard place when trying to resell their stuff.